Base of the company Mars Gaming designed for Laptop sizes up to 13" and that raises the laptop to the optimal height to reduce neck strain, making work on the laptop more convenient.
When you place your laptop on a surface, you will find that you have to look down to see the screen. The result is the weight of your head putting pressure on your spine, which over time can cause pain and even long-term injuries. Maintaining a good working posture provided by a base - not hunching over the screen, will improve your productivity without the risk of injury.
Laptop stands are specially designed to be lightweight and compact, so you can put them in a laptop bag.